Wideband Loop Antenna With Split-Ring Resonators for Wireless Medical Telemetry

This letter presents a wideband flexible loop antenna with split-ring resonators (SRRs) for use in wireless medical telemetry. This design covers the entire MedRadio band (401–406 MHz) and four Industrial, Scientific, and Medical (ISM) bands (433.1–434.8, 868.0–868.8, and 902.8–928.0 MHz and 2.4–2.48 GHz). The SRRs improve the loop antenna return loss and reduce the power absorbed inside the human body over the multiband frequency ranges; they also result in increased radiation efficiency, gain, and transmission coefficient. A human body model has been used to study and optimize the antenna performance in a realistic environment and shows a reduction in specific absorption rate when the SRRs are used. Measurements are conducted in a tissue-simulating liquid phantom and show a good agreement with the simulations. This novel antenna could be used for a range of implantable applications such as wireless data transmission and wireless power transfer.

[1]  Asimina Kiourti,et al.  Implantable and ingestible medical devices with wireless telemetry functionalities: A review of current status and challenges , 2014, Bioelectromagnetics.

[2]  W. Qureshi.  Current and future applications of the capsule camera , 2004, Nature Reviews Drug Discovery.

[3]  Eva Rajo-Iglesias,et al.  Dual-band implantable antenna based on short-circuited SRR , 2010, Proceedings of the Fourth European Conference on Antennas and Propagation.

[4]  Shaoqiu Xiao,et al.  Design and Safety Considerations of an Implantable Rectenna for Far-Field Wireless Power Transfer , 2014, IEEE Transactions on Antennas and Propagation.

[5]  Muhammad Saeed Khan,et al.  Design and In Vivo Test of a Batteryless and Fully Wireless Implantable Asynchronous Pacing System , 2016, IEEE Transactions on Biomedical Engineering.

[6]  E. Topsakal,et al.  Characterization and Testing of a Skin Mimicking Material for Implantable Antennas Operating at ISM Band (2.4 GHz-2.48 GHz) , 2008, IEEE Antennas and Wireless Propagation Letters.

[7]  Gurpreet Kaur,et al.  IMPLANTABLE ANTENNAS FOR BIOMEDICAL APPLICATIONS , 2015 .

[8]  Ieee Standards Board.  IEEE standard for safety levels with respect to human exposure to radio frequency electromagnetic fields, 3kHz to 300 GHz , 1992 .

[9]  Yi Huang,et al.  A Broadband Flexible Implantable Loop Antenna With Complementary Split Ring Resonators , 2015, IEEE Antennas and Wireless Propagation Letters.

[10]  J. Bonache,et al.  Equivalent-circuit models for split-ring resonators and complementary split-ring resonators coupled to planar transmission lines , 2005, IEEE Transactions on Microwave Theory and Techniques.

[11]  Raj Mittra,et al.  An Ultrawideband Conformal Capsule Antenna With Stable Impedance Matching , 2017, IEEE Transactions on Antennas and Propagation.

[12]  Yong-Xin Guo,et al.  Design of a Dual-Polarized Wideband Conformal Loop Antenna for Capsule Endoscopy Systems , 2018, IEEE Transactions on Antennas and Propagation.

[13]  Aitor Arriola,et al.  Broadband UHF Implanted 3-D Conformal Antenna Design and Characterization for In-Off Body Wireless Links , 2014, IEEE Transactions on Antennas and Propagation.

[14]  Minkyu Je,et al.  Design and in Vitro Test of a Differentially Fed Dual-Band Implantable Antenna Operating at MICS and ISM Bands , 2014, IEEE Transactions on Antennas and Propagation.

[15]  Zhao Wang,et al.  An Implantable and Conformal Antenna for Wireless Capsule Endoscopy , 2018, IEEE Antennas and Wireless Propagation Letters.

[16]  Mustafa H. B. Ucar,et al.  An implantable microstrip antenna design for biomedical telemetry , 2013, 2013 International Conference on Electronics, Computer and Computation (ICECCO).

[17]  L. Le Coq,et al.  Robust Ultraminiature Capsule Antenna for Ingestible and Implantable Applications , 2017, IEEE Transactions on Antennas and Propagation.

[18]  Yong-Xin Guo,et al.  A Conformal Circularly Polarized Antenna for Wireless Capsule Endoscope Systems , 2018, IEEE Transactions on Antennas and Propagation.

[19]  Hui Chu,et al.  Design of a Circularly Polarized Ground Radiation Antenna for Biomedical Applications , 2016, IEEE Transactions on Antennas and Propagation.

[20]  Yi Huang,et al.  Flexible meandered loop antenna for implants in MedRadio and ISM bands , 2013 .

[21]  P. Dario,et al.  Capsule Endoscopy: From Current Achievements to Open Challenges , 2011, IEEE Reviews in Biomedical Engineering.

[22]  Li-Jie Xu,et al.  Dual-band implantable antenna with circular polarisation property for ingestible capsule application , 2017 .

[23]  C.M. Furse,et al.  Design of implantable microstrip antenna for communication with medical implants , 2004, IEEE Transactions on Microwave Theory and Techniques.

[24]  A. Kiourti,et al.  A Review of Implantable Patch Antennas for Biomedical Telemetry: Challenges and Solutions [Wireless Corner] , 2012, IEEE Antennas and Propagation Magazine.

[25]  Lin Li,et al.  A Miniature-Implantable Antenna for MedRadio-Band Biomedical Telemetry , 2015, IEEE Antennas and Wireless Propagation Letters.

[26]  C. Gabriel.  Compilation of the Dielectric Properties of Body Tissues at RF and Microwave Frequencies. , 1996 .

[27]  Yi Fan,et al.  A Miniaturized CSRR Loaded Wide-Beamwidth Circularly Polarized Implantable Antenna for Subcutaneous Real-Time Glucose Monitoring , 2017, IEEE Antennas and Wireless Propagation Letters.

[28]  A. Kiourti,et al.  Miniature Scalp-Implantable Antennas for Telemetry in the MICS and ISM Bands: Design, Safety Considerations and Link Budget Analysis , 2012, IEEE Transactions on Antennas and Propagation.

[29]  B. Fuchs,et al.  The Effect of Insulating Layers on the Performance of Implanted Antennas , 2011, IEEE Transactions on Antennas and Propagation.

[30]  Chin-Lung Yang,et al.  Implantable High-Gain Dental Antennas for Minimally Invasive Biomedical Devices , 2013, IEEE Transactions on Antennas and Propagation.

[31]  Chien-Ming Lee,et al.  Rectenna Application of Miniaturized Implantable Antenna Design for Triple-Band Biotelemetry Communication , 2011, IEEE Transactions on Antennas and Propagation.

[32]  Cheolbok Kim,et al.  A Compact Omnidirectional Self-Packaged Patch Antenna With Complementary Split-Ring Resonator Loading for Wireless Endoscope Applications , 2011, IEEE Antennas and Wireless Propagation Letters.

[33]  Tatsuo Itoh,et al.  Electromagnetic metamaterials : transmission line theory and microwave applications : the engineering approach , 2005 .

[34]  Leena Ukkonen,et al.  Split-Ring Resonator Antenna System With Cortical Implant and Head-Worn Parts for Effective Far-Field Implant Communications , 2018, IEEE Antennas and Wireless Propagation Letters.